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It tells us that the Universe is expanding.
What else can I help you with?
What does the Doppler effect tell scientists about the universe?
The Doppler effect causes objects that are moving towards an observer to increase in frequency while those that move away from an observer decrease in frequency. In 1920s and 1930s, Edward Hubble was measuring the Doppler shift of various stars in the night sky, and discovered that there were fa more shifted towards the red spectrum (lower frequency) then the blue spectrum (higher frequency). Hubble concluded from this fact that the universe is constantly expanding outwards, and formulated Hubbles Law to approcimate the rate of universal expansion.
What does the Doppler affect tell astronomers about a star?
The star attracts the planet; the planet attracts the star. As a result of the latter, the star changes position. If this change is such that the star moves away from us during one part of the planet's orbit, and towards us at another (or more generally, the star's speed towards us, or away from us, changes slightly), then this can be detected as a Doppler shift.
What can the Doppler effect tell us about in astronomy?
It can tell us whether a star, or a galaxy, is moving towards us or away from us.
How can astronomers tell how old the universe is by looking at the stars?
Well I think its because stars flake and burn out when their really old so that could help them tell.
How does the Doppler effect aid police in detecting speeding motorists?
Police speed traps using Radars rely on Doppler to tell vehicle speed.
Astronomers find that light coming from point A at the edge of the sun has a slightly higher frequency than light from point B at the opposite side What do these measurements tell us about the sun's?
This observation indicates that the Sun is rotating about its axis, causing a Doppler shift in the light's frequency. The difference in frequency between points A and B is due to the Doppler effect, showing that different parts of the Sun are rotating at varying speeds.
How does the Doppler shift determine the distance of Sirius?
It doesn't. The Doppler shift can tell you how fast something is moving towards us or away from us; not how far it is. Only in the case of distant galaxies can this be used to estimate the galaxy's distance, because of the expansion of the Universe (galaxies that move away from us faster are generally farther away).
What does a red shift tell astronomers about the movement of an object?
A red shift indicates that an object is moving away from the observer. This is a result of the Doppler effect, where light waves are stretched as an object moves away, causing them to shift towards the red end of the spectrum. Astronomers can use red shifts to determine the speed and direction of an object's movement.
What does the Doppler affect tell us?
The Doppler effect tells us that the frequency of a wave changes when the source of the wave or the observer is in motion relative to one another. This change in frequency results in a shift in the perceived pitch of sound waves or the perceived color of light waves.
What does analysis of colors tell astronomers about objects in space?
Analysis of colors from objects in space can help astronomers determine the object's temperature, composition, and age. Different colors indicate different chemical elements present in the object, as well as its evolutionary stage. By studying the colors, astronomers can gain valuable insights into the physical properties and processes occurring in space.
Do you use the Doppler effect or particle accelerators to measure the speed of stars?
The Doppler effect is used to detect whether a star is moving away from us or towards us. This method doesn't tell us anything about a star's "sideways" movement. OR The Doppler Effect should be corrected for the (gravitational) size of the star, since gravity also changes the light's energy. re: Sideways movement, I thought special relativity reacts to sideways motions? Besides, how long can a star be traveling sideways -- technically, no distance.
What causes a redshift in light from stars?
No. The Doppler shift tells us if the object is moving toward us or away, and how fast. But it says nothing at all about whether, or how fast, the object is moving to the side. Doppler tells us about the part of the velocity that is TOWARD or AWAY. It says nothing about its velocity left, right, up or down.
